以聚乙二醇为软模板制备微孔-介孔硅铝分子筛及其催化性能

以硅铝溶胶前驱体， 与聚乙二醇软模板剂混合， 水热处理后制备微孔-介孔硅铝分子筛. 采用X射线衍射（XRD）、 Fourier变换红外光谱（FT-IR）、 N₂吸附-脱附、 透射电镜（TEM）和氨气程序升温脱附（NH₃-TPD）表征微孔\|介孔硅铝分子筛的理化性质. 将所得微孔-介孔硅铝分子筛作为苯酚叔丁醇烷基化反应的催化剂， 利用苯酚的转化率测试材料的催化性能. 结果表明: 聚乙二醇作为软模板产生介孔结构， 且聚乙二醇加入量可影响硅铝分子筛的结晶度;   当聚乙二醇的加入量不同时， 苯酚的转化率受影响； 当聚乙二醇用量为8 g时， 苯酚转化率最高， 可达95.5%. 

Preparation of Micro-mesoporous Aluminosilicate Molecular Sieves Using Polyethylene Glycol as Soft Template and Their Catalytic Performance

The micro-mesoporous aluminosilicate molecular sieves were prepared by mixing aluminosilicate sol precursor with polyethylene glycol (PEG) soft template under hydrothermal condition. X-ray diffraction (XRD),  Fourier transform infrared (FT-IR) spectroscopy,  N₂ adsorption desorption,  transmission electron microscopy (TEM) and NH₃-temperature programmed desorption （NH₃-TPD） were used to characterize the physicochemical properties of the micro\|mesoporous aluminosilicate molecular sieves. The obtained micro\|mesoporous aluminosilicate molecular sieves were used as catalyst for alkylation of phenol with tert butyl alcohol.  The catalytic performance of the material was tested by the conversion of phenol. The results show that polyethylene glycol as a soft template produces mesoporous structure,  and the amount of polyethylene glycol can affect the crystallinity of aluminosilicate molecular sieves. The conversion of phenol is affected when the amount of PEG is different. When the dosage of polyethylene glycol is 8 g,  the conversion of phenol is the highest,  which can reach 95.5%.